# Relationship history for MSHA mine 3609553

Current hierarchy: **Donald  Lampus Jr → Doren Inc → Taylor**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Terra Resources, LLC → Taylor; 2007-08-13 to 2016-03-08; source msha-controller-operator-history
- **controller_controls_mine:** Ronald A.  Rizzo → Taylor; 2007-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald A.  Rizzo → Terra Resources, LLC; 2007-08-13 to 2016-03-08; source msha-controller-operator-history
- **operator_operates_mine:** Doren Inc → Taylor; 2016-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald  Lampus Jr → Taylor; 2016-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald  Lampus Jr → Doren Inc; 2016-03-09 to current/open; source msha-controller-operator-history